Limited Efficacy of Tolvaptan in Patients with Cirrhosis and Severe Hyponatremia: Real-Life Experience

BACKGROUND: Vaptans, vasopressin selective V2-receptor antagonists, represent the first pharmacologic approach to the treatment of hypervolemic hyponatremia in cirrhosis. However, information on the use of vaptans for patients with cirrhosis and hyponatremia in a real- life scenario is limited. Therefore, this study evaluated the effect of tolvaptan on serum sodium in patients with cirrhosis and severe hypervolemic hyponatremia. METHODS: Nine patients with cirrhosis and serum sodium <= 125 mEq/L were included. RESULTS: Only 2 of the 9 patients (22%) gained an increase in serum sodium > 130 mEq/L that persisted throughout treatment. In the remaining patients, serum sodium did not change or increased during the first days but decreased thereafter despite continuation of treatment. Only 1 patient developed hyperkalemia as a side effect. CONCLUSIONS: The efficacy of tolvaptan in patients with cirrhosis and severe hypervolemic hyponatremia seems to be limited. (C) 2016 Elsevier Inc. All rights reserved.